File processing method and device

Abstract

The embodiment of the application provides a file processing method and device. The file processing method comprises following steps: receiving an access request of a first application to a first file, wherein the access request comprises decryption information used for decrypting the first file; decrypting the first file according to the decryption information; creating a temporary file of the first file according to the decrypted first file; outputting the temporary file of the first file; and processing the first file and / or the temporary file according to operation of the first application on the temporary file. The embodiment of the application has following beneficial effects: by encipherment protection of an operation file of an application program, the file can be decrypted by a corresponding application program when the application program accesses the file and plaintext content of the file can be accessed. Therefore, data safety is ensured and privacy leakage is avoided. The method helps improve safety of storage files in a storage card.

Description

technical field [0001] The present application relates to the technical field of data processing, in particular to a file processing method and a file processing device. Background technique [0002] With the continuous development of modern communications and the continuous improvement of the performance of mobile terminals, mobile terminals such as mobile phones have entered the era of intelligent digital, and the Android (Android) system has become one of the mainstream operating systems for mobile devices due to its openness and ease of use. one. Android mobile phones are more and more closely related to personal life privacy and business activities, but it also brings problems of data security and privacy protection. [0003] According to the location of data storage, the data of the Android system is divided into the data in the internal SQLite database and the data in the external memory card. The data of the external memory card is mainly stored in a secure digital...

AI Technical Summary

Problems solved by technology

However, the Android system has too large a granularity of access permissions for files in the SD card. Only access and non-access permissions are controlled. As long as an application has applied for access to the SD card, it can read and tamper with most of the files in the SD card. , in short, an application can freely read and tamper with the files saved in the SD card by another application

For example, applications such as App A, App B, and App C generate their own files File A, File B, and File C during operation, and File A, File B, and File C are stored in the SD card. Malicious programs can access and tamper with these files as long as they apply for the permission to access the SD card, which can easily cause the leakage of private data such as photos and notepads of users

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